GYP updates for Windows.

This will break OSX for a moment.

common.gypi

@@ -14,6 +14,54 @@
     # TODO(benvanik): switch based on configuration.
     'llvm_path': 'build/llvm/release/',
     'llvm_config': '<(llvm_path)bin/llvm-config',
+    'llvm_includedir': '<(llvm_path)/include',
+    'llvm_cxxflags': [
+      # ?
+    ],
+    'llvm_libdir': '<(llvm_path)/lib',
+    'llvm_libs': [
+      #'pthread',
+      'LLVMCppBackendCodeGen',
+      'LLVMCppBackendInfo',
+      'LLVMAsmParser',
+      'LLVMTableGen',
+      'LLVMDebugInfo',
+      'LLVMX86Disassembler',
+      'LLVMX86AsmParser',
+      'LLVMX86CodeGen',
+      'LLVMSelectionDAG',
+      'LLVMAsmPrinter',
+      'LLVMX86Desc',
+      'LLVMX86Info',
+      'LLVMX86AsmPrinter',
+      'LLVMX86Utils',
+      'LLVMMCDisassembler',
+      'LLVMMCParser',
+      'LLVMInstrumentation',
+      'LLVMOption',
+      'LLVMArchive',
+      'LLVMBitReader',
+      'LLVMInterpreter',
+      'LLVMipo',
+      'LLVMVectorize',
+      'LLVMLinker',
+      'LLVMBitWriter',
+      'LLVMMCJIT',
+      'LLVMJIT',
+      'LLVMCodeGen',
+      'LLVMScalarOpts',
+      'LLVMInstCombine',
+      'LLVMTransformUtils',
+      'LLVMipa',
+      'LLVMAnalysis',
+      'LLVMRuntimeDyld',
+      'LLVMExecutionEngine',
+      'LLVMTarget',
+      'LLVMMC',
+      'LLVMObject',
+      'LLVMCore',
+      'LLVMSupport',
+    ],
   },
 
 
@@ -32,7 +80,71 @@
     ],
 
     'configurations': {
+      'common_base': {
+        'abstract': 1,
+
+        'msvs_configuration_platform': 'x64',
+        'msvs_configuration_attributes': {
+          'OutputDirectory': '$(SolutionDir)$(ConfigurationName)',
+          'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
+          'CharacterSet': '1',
+        },
+        'msvs_disabled_warnings': [],
+        'msvs_configuration_platform': 'x64',
+        'msvs_cygwin_shell': '0',
+        'msvs_settings': {
+          'VCCLCompilerTool': {
+            #'MinimalRebuild': 'false',
+            'BufferSecurityCheck': 'true',
+            'EnableFunctionLevelLinking': 'true',
+            'RuntimeTypeInfo': 'false',
+            'WarningLevel': '3',
+            #'WarnAsError': 'true',
+            'DebugInformationFormat': '3',
+            'ExceptionHandling': '1', # /EHsc
+            'AdditionalOptions': ['/MP'],
+          },
+          #'VCLibrarianTool': {
+          #  'AdditionalLibraryDirectories!':
+          #    ['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
+          #  'AdditionalLibraryDirectories':
+          #    ['<(DEPTH)/third_party/platformsdk_win7/files/Lib/x64'],
+          #},
+          'VCLinkerTool': {
+            'GenerateDebugInformation': 'true',
+            #'LinkIncremental': '1', # 1 = NO, 2 = YES
+            'TargetMachine': '17', # x86 - 64
+            'AdditionalLibraryDirectories': [
+              '../../<(llvm_libdir)',
+            ],
+            #'AdditionalLibraryDirectories!':
+            #  ['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
+            #'AdditionalLibraryDirectories':
+            #  ['<(DEPTH)/third_party/platformsdk_win7/files/Lib/x64'],
+          },
+        },
+
+        'scons_settings': {
+          'sconsbuild_dir': '<(DEPTH)/build/xenia/',
+        },
+
+        'xcode_settings': {
+          'SYMROOT': '<(DEPTH)/build/xenia/',
+          'ALWAYS_SEARCH_USER_PATHS': 'NO',
+          'ARCHS': ['x86_64'],
+          'GCC_C_LANGUAGE_STANDARD': 'c99',
+          'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',
+          'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES',
+          'WARNING_CFLAGS': ['-Wall', '-Wendif-labels'],
+          'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',
+        },
+
+        'defines': [
+        ],
+      },
+
       'debug': {
+        'inherit_from': ['common_base',],
         'defines': [
           'DEBUG',
         ],
@@ -58,7 +170,12 @@
           'GCC_OPTIMIZATION_LEVEL': '0',
         },
       },
+      'debug_x64': {
+        'inherit_from': ['debug',],
+      },
+
       'release': {
+        'inherit_from': ['common_base',],
         'defines': [
           'RELEASE',
           'NDEBUG',
@@ -86,22 +203,9 @@
           },
         },
       },
-    },
-
-    'msvs_configuration_platform': 'x64',
-    'msvs_cygwin_shell': '0',
-    'scons_settings': {
-      'sconsbuild_dir': '<(DEPTH)/build/xenia/',
-    },
-    'xcode_settings': {
-      'SYMROOT': '<(DEPTH)/build/xenia/',
-      'ALWAYS_SEARCH_USER_PATHS': 'NO',
-      'ARCHS': ['x86_64'],
-      'GCC_C_LANGUAGE_STANDARD': 'c99',
-      'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',
-      'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES',
-      'WARNING_CFLAGS': ['-Wall', '-Wendif-labels'],
-      'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',
+      'release_x64': {
+        'inherit_from': ['release',],
+      },
     },
   },
 }